From e84813e7cc84c26a921ab9b188d5a7c287c4d65e Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Tue, 19 Jun 2018 10:16:23 +0200
Subject: [PATCH] Prevent hard errors if fetching the `Encrypt` dictionary
 fails in `XRef.parse`

---
 src/core/obj.js | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/core/obj.js b/src/core/obj.js
index 641190f7d..620efbf4e 100644
--- a/src/core/obj.js
+++ b/src/core/obj.js
@@ -855,7 +855,16 @@ var XRef = (function XRefClosure() {
       }
       trailerDict.assignXref(this);
       this.trailer = trailerDict;
-      var encrypt = trailerDict.get('Encrypt');
+
+      let encrypt;
+      try {
+        encrypt = trailerDict.get('Encrypt');
+      } catch (ex) {
+        if (ex instanceof MissingDataException) {
+          throw ex;
+        }
+        warn(`XRef.parse - Invalid "Encrypt" reference: "${ex}".`);
+      }
       if (isDict(encrypt)) {
         var ids = trailerDict.get('ID');
         var fileId = (ids && ids.length) ? ids[0] : '';